Isn't it time for us to demand the electric car vehicle manufacturer to TOTALLY RE-DESIGN the electric cars, so that it won't weight so much ?
There is no physics based reason for a car to weigh as much as it does. Take off the body and replace with folding chairs and a flat board and the vehicle will weigh substantially less and mpg will probably quadruple. Of course, when that car moving 40+ mph hits another car, or an inanimate object like a tree, the occupants will all be killed or seriously injured, but that is okay, because we've improved fuel efficiency.</sarcasm>
In all seriousness, if the NHTSA is going to mandate minimum standards for collisions then the car has to be heavy. You can have lightweight, or safe in a high speed collision, but not both.